A Speech Denoising Algorithm Based on Harmonic Regeneration | Zendy

Zengyuan Liu | Zendy; Dong Anming | Zendy

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A Speech Denoising Algorithm Based on Harmonic Regeneration

Author(s) -

Zengyuan Liu,

Dong Anming

Publication year - 2019

Publication title -

iop conference series earth and environmental science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.179

H-Index - 26

eISSN - 1755-1307

pISSN - 1755-1315

DOI - 10.1088/1755-1315/332/2/022042

Subject(s) - harmonics , harmonic , signal (programming language) , computer science , distortion (music) , noise (video) , harmonic analysis , noise reduction , speech enhancement , speech recognition , algorithm , reduction (mathematics) , total harmonic distortion , reservation , fundamental frequency , mathematics , acoustics , artificial intelligence , electronic engineering , engineering , telecommunications , physics , amplifier , computer network , electrical engineering , image (mathematics) , programming language , geometry , bandwidth (computing) , voltage

Single channel speech enhancement in noisy environments is studied in this paper. Traditional speech enhancement methods that based on short time spectral analysis frequently introduce harmonic distortion due to imprecise noise spectral estimation. A kind of technology which is called harmonic regeneration is used to overcome the defect of traditional speech enhancement methods, and damaged harmonics are restored. Firstly, a non-linear operation is used on the harmonic distorted signal to generate an artificial signal which contains all of harmonics of pure speech signal. Secondly, the artificial signal is used to correct the traditional noise reduction gain function, and the purpose of harmonic reservation is reached. Theoretical analysis, objective and subjective results indicate that the harmonic regeneration algorithm can improve speech quality dramatically. The computational complexity of the new algorithm is rather low, and it can be easily implemented in real time applications.

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